Laboratory and numerical investigation of microwave heating properties of asphalt mixture

Laboratory and numerical investigation of microwave heating properties of asphalt mixture

Wang, H. (TU Delft Pavement Engineering)
Zhang, Yue (Rheinisch-Westfälische Technische Hochschule)
Zhang, Yi (Chang'an University)
Feng, Shuyin (University of Bristol)
Lu, Guoyang (Rheinisch-Westfälische Technische Hochschule)
Cao, Lintao (Hubei University of Arts and Science)

2019

Microwave heating is an encouraging heating technology for the maintenance, recycling, and deicing of asphalt pavement. To investigate the microwave heating properties of asphalt mixture, laboratory tests and numerical simulations were done and compared. Two types of Stone Mastic Asphalt (SMA) mixture samples (with basalt aggregates and steel slag aggregates) were heated using a microwave oven for different times. Numerical simulation models of microwave heating of asphalt mixture were developed with finite element software COMSOL Multiphysics. The main thermal and electromagnetic properties of asphalt mixture, served as the model input parameters, were measured through a series of laboratory tests. Both laboratory-measured and numerical simulated surface temperatures were recorded and analyzed. Results show that the replacement of basalt aggregates with steel slag aggregates can significantly increase the microwave heating efficiency of asphalt mixture. Numerical simulation results have a good correlation with laboratory test results. It is feasible to use the developed model coupling electromagnetic waves with heat transfer to simulate the microwave heating process of asphalt mixture.

Asphalt mixture
Dielectric loss
Electromagnetic
Microwave heating
Numerical simulation
Steel slag

http://resolver.tudelft.nl/uuid:644b752d-302d-4953-9a5a-78a9d3384b6c

https://doi.org/10.3390/ma12010146

1996-1944

Materials, 12 (1)

Institutional Repository

journal article

© 2019 H. Wang, Yue Zhang, Yi Zhang, Shuyin Feng, Guoyang Lu, Lintao Cao